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在季节性冻土地区,由于冻拔作用常使加筋土坡中土工格栅浮出地面,导致加筋作用失效,但国内关于其破坏防治的试验研究较少。通过室外冻胀试验,研究利用非冻胀性材料置换的方法对抑制土工格栅冻拔破坏的效果。对比火山灰置换与未置换的两块土工格栅的冻胀数据结果表明,置换侧的土工格栅的最终残余冻胀量较未置换侧的低50%。因此,置换方法对于抑制土工格栅的冻胀破坏效果明显,具有较强的工程实用价值。
In the seasonal frozen soil region, the geogrid in the reinforced soil slope often floats out of the ground due to the freezing and thawing, which results in the failure of the reinforcement effect. However, there are few experimental researches on the prevention and control of the damage. Through the outdoor frost heave test, the effect of non-frostbite material replacement on the inhibition of geogrid freeze-thaw destruction was studied. Comparing the frost heave data of two geogrids with or without replacement of volcanic ash, the results show that the final residual frost heaving capacity of the geogrid on the replacement side is 50% lower than that on the unchangeable side. Therefore, the replacement method for inhibiting the geogrid frost heaving destruction is obvious, with strong engineering practical value.